An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 5996-01-490-5040
NSN 5990-00-985-1334
NSN 6145-01-283-5505
NSN 6685-01-436-3475
NSN 5950-01-428-4020
NSN 5965-00-732-8608
NSN 5910-00-878-5733
NSN 5910-01-474-7968
NSN 6220-01-279-1331
NSN 5950-01-333-4195
NSN 5945-00-683-8334
NSN 2925-01-190-7820